Install Practices

Line-set sizing and insulation, brazing with nitrogen, proper evacuation to 500 microns, and startup and commissioning done right.

4 guides

• Brazing Refrigerant Lines With Flowing Nitrogen
  Why you push a trickle of dry nitrogen through copper while you braze refrigerant joints, how to set the flow, and how skipping it loads the system with black scale that wrecks metering devices and compressors.
• Line-Set Sizing and Insulation Done Right
  How to pick the right suction and liquid line diameters for an install, why you follow the manufacturer's tables instead of the old set, and how to insulate the suction line so the system performs and doesn't sweat.
• Startup and Commissioning Checklist for a New Install
  A field-ordered checklist for starting up and commissioning a new split system — electrical and airflow verification first, then charge confirmation by superheat or subcooling, operational checks, and the documentation that protects you and the customer.
• System Evacuation and the 500-Micron Decay Test
  How to evacuate a refrigerant system the right way — micron gauge placement, the 500-micron target, the standing decay test that proves dry-and-tight, and why a compound gauge can't tell you any of it.

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